LM3530 White LED Driver

National Semiconductor's LM3530 current mode boost converter supplies the power and controls the current in up to 11 series white LED's. The 839mA current limit and 2.7V to 5.5V input voltage range, makes the device a versatile backlight power source ideal for operation in portable applications. The LED current is adjustable from 0mA to 29.5mA via an I2C compatible interface. The 127 different current steps and eight different maximum LED current levels give over 1000 programmable LED current levels. Additionally, PWM brightness control is possible through an external logic level input. LM3530 Product Brief